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Old 06-22-2016, 09:46 AM   #1
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Prep for roof re-caulking

There's got to be an easier way to clean the old caulk before reapplying
All I've ever read or heard of is mineral spirits and acetone and I've tried this on the old beater years ago and I don't have the energy to kneel up there with a little rag and rub for hours on end
Wesley's Bleach white???
Concentrated motorcycle wash????
Simple Green?
Purple power?
Crud cutter?
Anyone with any suggestions would be great
I was up on the '14 last night and the Dicore on the screw heads is getting thin and a new coat all the way around is going to be necessary before the end of this season.
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Old 06-22-2016, 12:03 PM   #2
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If your referring to just cleaning the old caulk before applying the new, try Tilex Bathroom Mold/Mildue Cleaner. Works well.
If you mean removing the old caulk completly, then its the stiff plastic scrapers, mineral spirits and acetone. And, a good pair of knee pads!!!
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Old 06-22-2016, 05:09 PM   #3
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No Grump I just wanted to clean and reapply over top
I was under the impression that's the preferred way
Do people actually strip off (scrape) all the Dicor and reapply every year or two?
Not Me



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Old 06-22-2016, 05:26 PM   #4
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No need to remove it. Just wasen't sure from your post.
I just got done cleaning my roof and re-applying some Dicor to some areas, this past weekend.
Had been using the mineral spirits/acetone, but decided to try the Tilex.
Cleaned my fiberglass roof with Tilex this time, as opposed to the auto wash stuff I'd been using, and when some got onto the old Dicor caulk, noticed it cleaned it really well...back to white.
Just used a soft bristle brush on roof, and sprayed some on caulk. Brushed it, let it sit for a minute, and rinsed it off with water.
When roof dried, it was "squeaky" clean with no residue.
New Dicor went on and looks like new.
Yeah, it's a pain in the arse to do every few years, but it pays in the long run.
Sides, two fans, bathroom fan/vent, antenna,, vents...gotta do em all. Can't skimp on it. Have a 4" strip of Eternabond covering the front and rear seam where caps meet roof.
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Old 06-23-2016, 04:52 PM   #5
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Dicor

At the rally last year, Dicor told me that you can apply additional Dicor over the existing Dicor by just washing the old stuff before application.
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Old 06-23-2016, 05:01 PM   #6
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I always just look every spring and fall, and if it is cracking, which is the only problem I have seen, clean with Mineral Spirits and apply some more.
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Old 06-23-2016, 05:41 PM   #7
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If I were to use Tilex and got some on the roof by accident, would it hurt rubber roof?
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Old 06-23-2016, 06:17 PM   #8
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I just clean it with Simply Green and I brush...like a kitchen vegetable brush...rinse and let it dry a day or so. Then caulk.

Used to do the Denatured alcohol thing but have compared two year old caulk that was applied when I used both methods...both were stuck down fine.

As long as the surface is clean/dry and the caulk underneath is not dried out and starting to like fall apart...I have never had an issue.

BTW I am talking the roof EPDM..not sides where it is fiberglass. On the Fiberglass I NEVER use Simply Green but go back to Alcohol. I have had Simply Green leave a mark in the fiberglass where I used it. Was not visible at first until I looked at it from an angle. Apparently it cleaned a bit more than just the dirt and wax.
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